起因
我们在开发app可能会拓展国外市场,那么对包含英语在内的其它语言支持就很有必要了。
效果
multilanguage.gif思路
一:添加相关资源文件,并引用。
二:设置configuration,configuration里面指定语言类型。
三:在需要时候更换configuration即可。
实现
在res的values文件夹下新建相关语言类型的资源文件
右键新建资源文件,选择Locale,点击 >> 按钮
a.png
选择Language,以及地区(any region)即可
b.png
最后 文件名字和其他语言文件名字一样,strings即可。
在MyApplication里面的onCreate和onConfigurationChanged方法里面添加语言相关处理(onConfigurationChanged是为了处理横竖屏切换问题),给应用上下文对象添加configuration,configuration里面指定了当前语言。
public class MyApplication extends Application {
@Override
public void onCreate() {
super.onCreate();
languageWork();
}
@Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
languageWork();
}
private void languageWork() {
//自己写的工具包(如下)
Locale locale = LanguageUtil.getLocale(this);
LanguageUtil.updateLocale(this, locale);
}
}
LanguageUtil如下(没整理过的小伙伴直接用即可),为了保证语言从A切换到B,在之后启动应用依旧使用B语言,我们需要将B语言存入本地。下次启动应用,设置即可。
public class LanguageUtil {
/**
* 中文
*/
public static final Locale LOCALE_CHINESE = Locale.CHINESE;
/**
* 英文
*/
public static final Locale LOCALE_ENGLISH = Locale.ENGLISH;
/**
* 俄文
*/
public static final Locale LOCALE_RUSSIAN = new Locale("ru");
private static final String LOCALE_SP = "LOCALE_SP";
private static final String LOCALE_SP_KEY = "LOCALE_SP_KEY";
public static Locale getLocale(Context context) {
SharedPreferences spLocale = context.getSharedPreferences(LOCALE_SP, Context.MODE_PRIVATE);
String localeJson = spLocale.getString(LOCALE_SP_KEY, "");
Gson gson = new Gson();
return gson.fromJson(localeJson, Locale.class);
}
private static void setLocale(Context pContext, Locale pUserLocale) {
SharedPreferences spLocal = pContext.getSharedPreferences(LOCALE_SP, Context.MODE_PRIVATE);
SharedPreferences.Editor edit = spLocal.edit();
String json = new Gson().toJson(pUserLocale);
edit.putString(LOCALE_SP_KEY, json);
edit.apply();
}
public static boolean updateLocale(Context context, Locale locale) {
if (needUpdateLocale(context, locale)) {
Configuration configuration = context.getResources().getConfiguration();
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
configuration.setLocale(locale);
} else {
configuration.locale = locale;
}
DisplayMetrics displayMetrics = context.getResources().getDisplayMetrics();
context.getResources().updateConfiguration(configuration, displayMetrics);
setLocale(context, locale);
return true;
}
return false;
}
public static boolean needUpdateLocale(Context pContext, Locale newUserLocale) {
return newUserLocale != null && !getCurrentLocale(pContext).equals(newUserLocale);
}
public static Locale getCurrentLocale(Context context) {
Locale locale;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) { //7.0有多语言设置获取顶部的语言
locale = context.getResources().getConfiguration().getLocales().get(0);
} else {
locale = context.getResources().getConfiguration().locale;
}
return locale;
}
}
进行切换,主要触发动作是activity的recreate()(切换使用新的configuration)。所有的activity在activityManager里面进行管理。只需将其他(除了当前语言选择activity)的所有activity进行recreate(),即可。languageUtil同时进行了是否需要切换语言的判定。如果当前语言和要选择的一致,则无需再做处理)
public void onClick(View view) {
boolean need = false;
switch (view.getId()) {
case R.id.chinese:
need = LanguageUtil.updateLocale(this, LanguageUtil.LOCALE_CHINESE);
if (need) {
//自己写的常用activity管理工具
ActivityManager.getInstance().recreateAllOtherActivity(this);
Toast.makeText(this, "change to chinese", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(this, "no need", Toast.LENGTH_SHORT).show();
}
break;
case R.id.english:
need = LanguageUtil.updateLocale(this, LanguageUtil.LOCALE_ENGLISH);
if (need) {
ActivityManager.getInstance().recreateAllOtherActivity(this);
Toast.makeText(this, "change to english", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(this, "no need", Toast.LENGTH_SHORT).show();
}
break;
case R.id.russian:
need = LanguageUtil.updateLocale(this, LanguageUtil.LOCALE_RUSSIAN);
if (need) {
ActivityManager.getInstance().recreateAllOtherActivity(this);
Toast.makeText(this, "change to russian", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(this, "no need", Toast.LENGTH_SHORT).show();
}
break;
}
}
ActivityManager如下
public class ActivityManager {
private static final Stack<Activity> sActivityStack = new Stack<>();
private static ActivityManager sActivityManager;
private ActivityManager() {
}
public Stack<Activity> getActivityStack() {
return sActivityStack;
}
/**
* 单一实例
*/
public static ActivityManager getInstance() {
if (sActivityManager == null) {
synchronized (ActivityManager.class) {
sActivityManager = new ActivityManager();
}
}
return sActivityManager;
}
/**
* 添加Activity到堆栈
*/
public void addActivity(Activity activity) {
sActivityStack.add(activity);
}
/**
* 删除堆栈中的Activity
*/
public void removeActivity(Activity activity) {
if (sActivityStack.isEmpty()) {
return;
}
sActivityStack.remove(activity);
}
/**
* 获取当前Activity(堆栈中最后一个压入的)
*/
public Activity currentActivity() {
Activity activity = sActivityStack.lastElement();
return activity;
}
/**
* 结束当前Activity(堆栈中最后一个压入的)
*/
public void finishActivity() {
Activity activity = sActivityStack.lastElement();
finishActivity(activity);
}
/**
* 结束指定的Activity
*/
public void finishActivity(Activity activity) {
if (activity != null) {
sActivityStack.remove(activity);
activity.finish();
}
}
/**
* 结束指定类名的Activity
*/
public void finishActivity(Class<?> cls) {
for (Activity activity : sActivityStack) {
if (activity.getClass().equals(cls)) {
finishActivity(activity);
return;
}
}
}
//获取指定类名的Activity
public Activity getActivity(Class<?> cls) {
for (Activity activity : sActivityStack) {
if (activity.getClass().equals(cls)) {
return activity;
}
}
return null;
}
/**
* 结束所有Activity
*/
public void finishAllActivity() {
for (int i = 0, size = sActivityStack.size(); i < size; i++) {
if (null != sActivityStack.get(i)) {
sActivityStack.get(i).finish();
}
}
sActivityStack.clear();
}
public void finishAllOtherActivity(Activity activity) {
for (int i = 0, size = sActivityStack.size(); i < size; i++) {
if (null != sActivityStack.get(i) && sActivityStack.get(i) != activity) {
sActivityStack.get(i).finish();
}
}
sActivityStack.clear();
}
public void recreateAllOtherActivity(Activity activity) {
for (int i = 0, size = sActivityStack.size(); i < size; i++) {
if (null != sActivityStack.get(i) && sActivityStack.get(i) != activity) {
sActivityStack.get(i).recreate();
}
}
}
/**
* 退出应用程序
*/
public void AppExit() {
try {
finishAllActivity();
System.exit(0);
} catch (Exception e) {
}
}
}
将app的所有acitivity进行添加和移除,可以在BaseActivity里面进行。
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
ActivityManager.getInstance().addActivity(this);
}
@Override
protected void onDestroy() {
super.onDestroy();
ActivityManager.getInstance().removeActivity(this);
}
以上步骤,我们的语言切换算是完成了。但是,在API 26+以上版本,我们需要额外添加如下代码做兼容,没啥说的,SDK变动而已,跟着SDK走咯~(在activity或者BaseActivity添加)
@Override
protected void attachBaseContext(Context newBase) {
Context context = languageWork(newBase);
super.attachBaseContext(context);
}
private Context languageWork(Context context) {
// 8.0及以上使用createConfigurationContext设置configuration
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
return updateResources(context);
} else {
return context;
}
}
@RequiresApi(api = Build.VERSION_CODES.O)
private Context updateResources(Context context) {
Resources resources = context.getResources();
Locale locale = LanguageUtil.getLocale(context);
if (locale==null) {
return context;
}
Configuration configuration = resources.getConfiguration();
configuration.setLocale(locale);
configuration.setLocales(new LocaleList(locale));
return context.createConfigurationContext(configuration);
}
完工~
网友评论
组件化和插件化的开发里程总结
https://www.jianshu.com/p/df2a6717009d